Hypselodoris krakatoa from Solomon Ids

August 28, 2008
From: Barbara Hanchard


Concerning message #21818:

Hi Bill,

Dug back through my photos of Hypselodoris krakatoa which I found back in 2006 on a very memorable dive. Reason I remember it so well is that there were at least 6 different species covering this wreck which had only gone down 4 months prior. For the most part the wreck looked as it was just covered in sediment rather than the beginnings of a fairly established ecosystem of sponges and soft corals. All of the nudibranchs were on the brown patchy "sediment" areas possibly feeding on whitish/opaque looking sponge beneath or on closer inspection on the branch like growth that is covered in sediment.

Locality: Tommy Chan Wreck, Ranadi, 35 meters, Honiara, Solomon Islands, Pacific, 12 January 2006, Wreck. Length: 40mm. Photographer: N. Barbara Hanchard.

Barbara Hanchard

barbara.hanchard@ffa.int

Hanchard, N.B., 2008 (Aug 28) Hypselodoris krakatoa from Solomon Ids. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21834

Dear Barbara,
Thanks for looking out these photos. The one in which we can see the whitish sponge is another of those tantalising photos which don't quite answer the question. It could well be a dysideid sponge, on which species of Hypselodoris usually feed,  but there is not enough evidence of a fibrous structure present for me to make even a reasonable guess. It could lack such a skeleton or perhaps the fibres are just not visible in the photo. One day we will find some animals all clustered on an easily recognisable sponge colony, but unfortunately, not today.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Aug 28). Comment on Hypselodoris krakatoa from Solomon Ids by Barbara Hanchard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21834

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